Stop motion for drawing frames



. 1 635 693 J l 12,1927. w J SCOTT STOP MOTION FOR DRAWING FRAMES Filed June 12, 1926 2 Shawls-Sheet l I INVENVTOR.

36' W/fbr J @0071? I :9 3 [WM ATTO 1,635,693 Jgl? 12,1927. w J. SCOTT 7 STOP MOTION FOR DRAWING FRAMES 2 Sheets-Sheet 2 INVENTOR.

(VI 016v (900/1? Filed June 12 1926 BY 1' M ATTORNEYS;

.Patented July 12, 1927.

UNITED STATES PATENT oFFI c E."

WALTER J. soon, or WooNsooKE'r, rtHonE, ISLAND. j

smor MOTION non DRAWING FRAMES.

Application filed June 12,

This invention relates to an improved stop motion for drawing frames; and has for its object to provide in such a stop motion an electric circuit controlling liftbar extending longitudinally of one of the draft rolls and spaced therefrom, the bar being in an electric circuit whereby when the roving breaks and winds about the, draft roll it builds up beneath the bar and raises the same to so afiect'the electric circuit as to stop the operating mechanism of the drawing frame.

A further object'ofthe invention is to so arrange the mechanism that the raising of the lift bar makes a contact and completes the circuit to energize a motor and release a 1 shift lever to throw the belt from the tight to the loose pulley to stop the machine.

lVith these and other objects in View, the invention consists of certain novel features of construction as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings: 1 Figure lis an end elevation showing the roving as being fed through the machine and showing a portionof my. improved stop mechanism positioned adjacent one of the draft rolls. i Y

Figure 2 is a perspective view showing the contact bar as positioned adjacent the upper draft rolls and the contacts arranged to be engaged when either end of thisbar is lifted to complete: an electric circuit.

Figure 3 is a perspective view showing the I belt shifting mechanism :and the tripping mechanism which is electrically operated when the lift bar is raised into engagement with one of the-contacts to complete the electric circuit.

Figure 4L is an enlarged view showing the lift bar as raised into engagement with. the

contact member by the winding of the .roving about the roll.

Figure 5 isa diagrammatic View illustrating the electric wiring diagram and the electrically operating mechanism arranged to move the tripper to release the detent and permit the shift lever to move the belt from the tight to the loose pulley.

Figure 6 is a detail showing the notched end of the shift arm in released position to be engaged and reset by a resetting movement of the shift lever.

Figure 7 is a plan view showing the end of the tripper in section and showing the 1926. SerialNo. 115,432.

outwardly and then snap into the forked end of this arm.

Figure 8 is adetail side'elevation showing the downwardly turned endjof the tripper as engaging theslot in the end of the detent arm.

It is found in practice in the operation of such, machines as worsted drawing machines and the like, of advantage to provide simple and effective means for stopping a machine,

when the roving breaksand begins to wind about its upper draft roll,-which breaking.

often occurs and ifthe machine is' not quick- 1y stopped each time muchyarn is wasted. My improved device is employed for the purpose of causing this roving as it starts to wind about the upper draft roll, to engage a lift bar which lies along and adjacent this roll to-lift the same into engagement with theelectrical contact to either close or open an electric circuit. to release the belt shift lever to throw the belt from the tight to the loose pulley and'so stop the machine,

thus calling the attention of the attendant to at once repair the broken roving and start the machine into operation again; and the following-is a detailed description' of the present embodiment of my invention and showing one means by which these advan tageous results may be accomplished.

With reference to the drawing, 10 designates one of-the lower draft rolls and 11 one of the upperdra'ft'rolls between which the roving 12 is led to the f1ie'13 to be twisted and wound upon the bobbin 142.

In order to provide a simple and effective.

stop-motion for arresting the action of the machine when this roving breaks and winds about the roll "11, I- have positioned a relatively small bar 15 of light-weightwith its opposite ends guided in the brackets 16 to slide vertically therein.

In these brackets l have mounted contact pins 17 which may be adjusted endwise and secured by a screw 18 in its post 19. To these posts 19 at either end of the bar I have connected the circuit wires 20 which posts are connected together by a cross wire 21 to lead through the wire 22 to the battery 23 or sourceof current.

This bar 15 is also connected by another circuit wire 24 to the belt shift lever 25 which also serves as a conductor in the circuit, and the tripper arm 26 also serving as coilspring 38 is arrangedto act upon this shift lever 86 so that when released'it will move the. belt from engagement with the tight pulley 30 over to the loose pulley 81 to sto 3 t ie machine.

11 order to release this belt shift lever. when the roving. breaksand winds about the draft roll 11, the lift bar 15 is so arranged. thatas this roving builds up about this rollit lifts either one end or the other: thereof into contact with thepin 17 and so completes the circuit through the mechanism t above described to energize the solenoid 29 .andto withdraw the tripper, from engagement 1 with the detent ar1n25 permitting the spring 38 to act on thislever to throw the detentarm around into the p osition illustrated by. the dotted line 40, in Figure 5 Which at once releases this lever to throw the belt onto the loose pulley, and the extending end l39- of this detenttariniis moved intothe position illus trated in Figure 6 so thatwhen this-lever: is again moved backinto operating-position it automatically swings the detent arm back into its operating p ositionrcansing ituto be engaged by the tripper lever 26 and the same is automatically set ready to repeat the op: eration Whenever the rovingds again woun-di about the roll to raise its bar and again com? plete the electric circuit.

Each set ofdraftrrolls is equipped Withal lift bar and 1 setofi contacts so thatrwheni any one of therovings in the machine: breaks the Whole machine is stopped until the attendant repairs the rovingnndagain starts the machine-in motion as above describedi My improved @stop a motion is very) simple and practical in construction, is inexpensive to manufacture and is effective in itstopler' tion to stopthe machine whenever airovin is ibroken and Winds about its draft rolli.

The foregoin solely; towards t e construction illustrated,

description is directed but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invcntioiti being defined and liniited-onlyby the-tcrmsof the appended claims.

1. In anelectric stop motion for Worsted drawing frames, the combination with an electric circuit,- a stop motion in said circuit, a pair of draft rolls, a movable circuit clos-- ing element normally lying in; proximityto, but clear of the-working surface ofthe up per draft roll and above the path of the roving whereby a roving broken nude a draft: ing strain is wound about said upper roll and this roving is lHIllillllPiJllillG outcrisurface thereof to engage and move said elcment to close saidcircuit and stop the 111th chine.

2. In an electric stop motion for worsted drawing frames, the combinations with an electric circuit, a stop motion in said circuit,- a pair offront draftrolls, alongitudinally; disposed circuit closer rod positioncd in proximity to, but clear of, tho WOllilllgSLllh face of the upper draft roll, and above the path ofthe roving whereby a rovingdn-oltcn under adrafting,strain and Wound about said upper roll will build up on the outer surface of said roll to engage and more said rod to close said circuit andistop theme chine.

3'. In anwelectric stop motion for Worsted drawing, frames, the combination with: an electric circuit, a stop motion iinisaid circuit, a'pair of draft rolls, aacircuitrclosure;bara normally positioned in proximity, to, but clear of the workingsurface ofw'thei upper draft roll, and:above the path of:the roving, a: pair of guide brackets :inwhiclrthe ops pcsite ends ofzsaid bar are adjustably supported, a contact carriedby saidibrackets means for adjusting said-contact todctermine. the extentiof liftof said barnecessaryi for closing said. circuit whereby roving, broken; under a drafting strain and woundl about said upper 2 draft roll is builtpup on the outer surface thereof to engagesland mover said bar to close said :circuitiandistop the g machine.

I n testimonyr whereof iI allixuny signatures WALTER J. SCOTT? ill Iii 

